VCL - Canvas does not allow drawing

[TaKo91 0]

Hello,

when resizing or minimizing and maximizing VCL application the exception is thrown: First chance exception at $00007FFF326DBA99. Exception class EInvalidOperation with message 'Canvas does not allow drawing'.

Call stack shows exception is thrown in Vcl::Graphics::TCanvas::RequiredState(System::Set<Vcl::Graphics::TCanvasStates, (Vcl::Graphics::TCanvasStates)0, (Vcl::Graphics::TCanvasStates)3>)() - see attached call stack text file.

 

Best regards.

Call stack.txt

[Brandon Staggs 278]

Your mission, should you choose to accept it, is to find out which control has the canvas in that state and why.

[eivindbakkestuen 47]

Looks VCL themes related. What Delphi version? Reproducible in a simple test app?

[TaKo91 0]

Looks like the problem occurs when putting TSpeedButton with TRelativePanel into TScrollBox and then minimizing/maximizing  the application. (C++ Builder 12.1)

[David Heffernan 2345]

Consider sharing a program that behaves this way